Quercetin is a flavonoid, a naturally occurring pigment found in many plants and foods like onions, green tea, apples, red leaf lettuce and berries. It has antioxidant and anti-inflammatory effects that help reduce swelling, regulate blood sugar and lower the risk of heart disease.
Modern Discontent, an independent publisher of scientific papers on the Wuhan coronavirus (COVID-19), posted a review of quercetin and its benefits in relation to the disease. It gave a summary on how quercetin helps shuttle zinc, which has antiviral activity, into the cell of a human body. It has also shown that it can inhibit ACE2 receptor docking, which aids in preventing viral attachment and eventually viral entry into the cell.
If you are taking quercetin as a supplement, the most common dose is about 500 mg each day although some people can take up to 1,000 mg daily.
Supplements may also have other substances, such as bromelain or vitamin C, which may aid the body in absorbing quercetin more effectively. Presently, quercetin is being studied for its benefits in fighting SARS-CoV-2 and it is showing identical effects just like hydroxychloroquine. (Related: Fight off viral infections with the power of quercetin.)Quercetin: A flavonoid that fights COVID like hydroxychloroquine – Dr. Eddy Bettermann MD